Thread-deflector mechanism



Aug. 11, 1925.

1,549,328 RMIPLUMLEY THREAD DEFLECTOR MECHANISM Filed Aug. 2, 1925Patented fitug. 11, 1925.

UNITED ST ATES.

intents Parnu-'r orifice.

RAYMOND L. PLUMLEY, F BROOKLYN, YORK, ASSIGNOR 'O` FREDERICK OSA-NNCOMPANY, OF NEW YORK, N. Y., A CORPORATON OF NEW YORK.

THREADeDEFLECTOR IVIECHANISM;

Application filed Augusta, 1923.

To all whom may concern Be itv known that 1, RAYMOND L. PLUM- LEY, acitizen of the United States, residing at Brooklyn, in the county ofKings and State of New` York, have invented new and useful mprovementsin ThreadDeflector Mechanism, of which the followingV is aspecification.

rhis invention relates to-mechanism particularly intended for use withsingle thread sewing machines for engaging and deflecting the loop ofthread from the needle as presented to the looper so that successivepasses of the needle may cause stitches to be formed. Vilhile in manyrespects not limited to such use, the mechanism of this invention hasbeen particularly designed for button sewing machines of that typedisclosed in the application for patent filedby Robert L. Lyons, SerialNo. 633,625 for button sewing machine. The thread deflector is movableparallel to the looper shaft into and out of position to engage the loopand when in loop-engaging position is movable'laterally of the shaft,both motions being effected by a double cam carried by the looper shaft.

rThe present invention further comprises a novel construction of one ofthe followers for the cam, and other details of construction as willlater appear.

For a more complete understanding of this invention reference may be hadto the accompanying drawings in which Figure 1 is a fragmentary verticalsection through a button sewing machine containing the mechanism of thisinvention, the section being parallel to the looper shaft.

Figure 2 isa transverse section on line 2 2 of Figure 1.

Figure 3 is an inverted plan of. a portion of the mechanism detached.

Figures 4 and 5 are detail sections onlines and 5 5, respectively, ofVFigure 3.

Referring to these figures, 1 indicates` a portion ofthe worlr. carryingframe arm of the machine having a work plate 2 on its upper face onwhich the cloth is supported and in Figure 1 is also shown a buttonclamp 3 and a needle bar 4 carrying the needle 5. The needle is adaptedto be given its sewing and retracting strokes through an opening 6 inthe worlr plate and the upper face of the frame arm into cooperativerelation to a looper 7 of any suitable description which is xed at theend of a looper shaft 8.

Serial No. 655,280.

This looper shaft is journaled adjacent the l'ooper in a bearingpartition 9, extending laterally of the arm 1, and has fixedtheretorearwardly of this bearing a cam block 10 for actuating the threaddeflector finger.

Supported above this block 10 is a plate 12 having a gu-ideway 13 cut inits under face, this guideway extending longitudinally of the plate andof the frame arm 1. As shown more clearly in Figure 2 this plateissupported on the upper face ofthe arm 1, the work plate 2 overlying it,the guideway 13 being downwardly disposed. Reciprocable in this guidewayis a plate member 14, which is held in position therein by a strip 15engaging under one marginal-edge thereof, and a pair of strips 16 and17, which bridge the guideway 13 adjacent opposite ends. The slide plate14 is laterally extended at one side, as shown at 18, this extensionriding ina recess 19 in the plate 12, this recess forming in eifect acontinua: tion laterally of the guideway 13.r Pivoted at one end on thisextension 18 on a pivot screw 2O is the loop deflector linger 21. Thisdei'iector finger projects between the guide strip 17 and the lower faceof the plate 12, this guide strip being cut away for a por tion of itslength to provide a passage 22 within which the deflector finger rides,this guideway permittingthe finger to have a limited pivotal movementabout the screw 20. The slide 14 has depending therefrom a post 23serving as a cam follower and riding in a cam groove 24 in the cam block10. r:his groove is formed in the periphery of the cani block so that.the cam positively controls the lengthwise'position of the member 14 andslides it in the guideway 13properly timed with relation to the rotationof the looper. The deflector finger 21: has depending therefrom a camfollower post which isadapted to ride against the sideiof anelongatedcam hub 31. on' the camblock 10. The elongation of this` cam portion isfor the purpose of insuring actuation of the follower thereby in alllengthwise positions of the slide 14. This hub portion 31 acts to movethe thread nger positively in one direction only, it being necessary tohold the follower up aga-inst the cam in order to control its position.As shown this is accomplished by means of a spring wire 32 slidablyengaging the opposite side of the follower 30 from the hub 31, this wireas wus-...wg

shown being coiled about one of the fastener screws 83 employed toretain the bridge strip 16 in position and the opposite end of thisspring wire is shown as attached to the screw fastening 84 by which theopposite end of the strip 16 is made fast. This spring wire, therefore,urges the deflector finger toward one limit of its pivotal motion, whichis substantially in line with the slide 14, while the cam4 hub 31 at theproper time imparts lateral motion thereto in the other direct-ion.

The cam follower 30 is of considerable length and in order that it maybe properly i fixed to the finger 2l and yet present a hardened surfaceto contact with the hub 31, the construction best illustrated in Figure5 is provided. Referring to this figure it will be seen that thefollower 30 comprises a hardened bushing or sleeve 40 through whichpasses a'relatively soft rivet member il having a head 42 at its outerend seated in an enlarged portion of the bore of the sleeve 4i() and'having its other end passed through a perforation in the finger 2l andheaded over as shown at 48.

Having thus described an embodiment of this invention it should beevident that various changes and modifications might be made thereinwithout departing from its spirit or scope as defined by the appendedclaims.

I claim:

l. In combination with a looper shaft having a looper thereon, of amember reciprocable parallel to said shaft, a deflector finger pivotedto said member, a cam block having a pair of cam portions carried bysaid shaft, a follower for one of said portions carried by said member,and a follower for the other of said portions carried by said finger.

2. In combination with a looper shaft having a looper thereon, of amember reciprocable parallel to said shaft, a deflector finger pivotedto said member, acam bloclr having a pair of cam portions carried bysaid shaft, a follower for one of said portions carried by said member,a follower for the other of said portions carried by said finger, and aspring for urging said finger toward one limit ofits pivotal motion.

3. A mechanism of the class describedy comprising a plate having aguideway therein, a member slidable in said guideway, a

defiector finger pivoted to said member, a post depending from saidmember by which it may be slid in said guideway, and a post dependingfrom said finger by which it may be swung laterally .of `said member.

t. A mechanism of the class described comprising a plate having aguideway in one face thereof, strips bridging said guidcway adjacentopposite ends, a member slidable in said guideway and held in positionby said strips, a defiector finger pivoted at one end to said member andhaving a limited swinging movement between said plate and one of saidstrips, a cam follower projecting from said finger and by which it maybe swung, and a spring fixed at one end to one of said bridge strips andengaging said follower for urging said finger to one limit of itsswinging motion.

5. A mechanism of the class described comprising a plate having aguideway in one face thereof, strips bridging said guideway adjacentopposite ends, a member slidable in said guidewayand held in position bysaid strips, a defiector finger pivoted at one end to said member andhaving a limited swinging movement between said plate and one of saidstrips, a cam follower projecting from said finger and by which it maybe swung, and a cam follower carried by said member and by which it maybe reciprocated.

6. A mechanism of the class described comprising a plate having aguideway `in one face thereof, strips bridging said guideway, means atopposite ends of one of said strips for fastening it to said plate, amember slidable in said guideway and held in position by said strips, adeflector finger pivoted at one end to said member and having a lim itedswinging movement between said plate and one of said bridge strips, acam follower projecting from said member and by which said member may bereciprocated, a cam follower projecting from said finger and by whichsaid finger may be swung, and a spring wire made fast to one of saidstrip fastening means, coiled about another strip fastening means andengaging one side of said finger cam follower for urging said fingertoward one limit of its swinging movement.

In testimony whereof I have affixed my signature.

RAYMOND L. PLUMLEY.

